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【简答题】
电流型逆变器中间环节采用电抗器滤波,()。 A. 电源阻抗很小,类似电压源 B.电源呈高阻,类似于电流源 B. 电源呈高阻,类似于电压源 D.电源呈低阻,类似于电流源
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反馈参考答案：
举一反三
【单选题】1941 年,我国第一部动画长片( )首次在黑白胶片中将火焰染成红色,突出了“火”的效果,同时也暗喻了抗战的艰辛与必胜的信心,只要团结必能打败侵略者。
A.
《哪吒闹海》
B.
《铁扇公主》
C.
《大闹天宫》
D.
《九色鹿》
【单选题】What are the two major considerations in deciding whether women should go out to work?
A.
The economic factor and their social status in their life.
B.
The social status and the family role they play in the family.
C.
The economic factor and the emotional needs of family members.
D.
The social status and the requirements of the society.
【多选题】What are the ethical considerations of assisted reproduction?
A.
Social and economical inequality
B.
Nontraditional families and the third party
C.
Commercialization and compensation of assisted reproduction technologies
D.
The risks on the resulting offspring that might not know his/her genetic characteristcs
【判断题】The net flow of financial assets and similar claims is the private current account balance.
A.
正确
B.
错误
【简答题】选取关键字‘特价’、“促销”、“优惠”、“开会”、“讨论”、“进展”、“决定”、“抓紧时间”,对两份email进行词频分析,得到两个词频向量: d1=(3, 2, 2, 0, 0, 0, 1, 2); d2=(0, 0, 0, 2, 3, 1, 1, 1)。 通过计算词频向量的余弦相似性来度量这两份email的相似度(精确到小数点后两位):()
【多选题】What are the Policy considerations for determining the torts?
A.
maintenance of a peaceful society
B.
deterrence
C.
social responsibility
D.
the balancing of economic interests against societal benefits
E.
to compensate the accused
【多选题】What are the four considerations of a business letter?
A.
Audience
B.
Style /Organization
C.
Writer
D.
Subject
E.
Purpose
F.
Address
【简答题】在纯电阻交流电路中 和 电压 同相。
【简答题】在冰箱内鸡蛋可保持4到6周仍不会变坏，但是去除蛋白的蛋黄，即使放在冰箱也很快地变坏。 （a）什么因素因素使蛋黄变坏的呢？ （b）你如何解释鸡蛋蛋白可以防止蛋黄变坏？ （c）这种保护模式对鸟类有什么益处？
【简答题】What are the Considerations when selecting a method of casting?
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